HARAJ65BR is a medium to high viscosity water-soluble flux formulated expressly for vertical hot air leveling systems, both manual and automatic. The viscosity is controlled to minimize de-wetting on surface mount pads and is formulated to insure first pass coverage on even difficult boards. HARAJ65BR provides optimal coverage on solder mask defined pads. There are also additives to this flux to minimize bridging on fine pitch surface mount pads. This flux is also especially suited for flat finishes on surface mount pads.